| article html file updated | 15 August 2026 03:58 CEST | Update | https://www.mdpi.com/2313-0105/4/3/31 |
| article html file updated | 9 February 2020 23:55 CET | Update | N/A |
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| article html file updated | 3 July 2018 14:12 CEST | Original file | N/A |
| article pdf uploaded. | 3 July 2018 14:11 CEST | Version of Record | https://www.mdpi.com/2313-0105/4/3/31/pdf |
| article xml uploaded. | 3 July 2018 14:11 CEST | Update | https://www.mdpi.com/2313-0105/4/3/31/xml |
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